I would like to know if you have the same "problem ". I've received a galaxy s8 last Friday. Everything was great except one. I've a noticed a potential image retention. For example, the (black) navbar remained on the screen for 3-5 second after closing an app. Or the black bar on the top (when apps aren't full screen) was noticeable also after closing. So I went to a store to see their galaxy s8 and s8+ and test it. The results was clear, their galaxy s8 had the same "problem" but not the s8+. So I decided to change my phone and get a new. Surprise, same thing... then I went to another store and their s8 also had this potential issue but not their s8+. So I've seen 4 galaxy s8 having this problem. My question is simple. Am I the only one ? Will it get worse ? Is it normal ? I don't think that my store is going to change my phone again. Keep in mind that this "image retention" is more noticeable on a blue or gray picture. Thanks for your answers.